Add "Toggle Snow Visibility" player vision suboption

[victorpopkov]

• I understand that if I ignore these instructions, my issue may be closed without review.
• I have made sure that there are no similar opened issues.
• I have made sure that the mod version matches the latest release.

Is your feature request related to a problem? Please describe.

It would make sense to have a snow visibility functionality within this mod whenever you test things.

Describe the solution you'd like

@ViktorYu234 has sent me the solution, so I don't need to dig on my own:

for i = 0,2 do TheWorld.Map["SetOverlayColor"..i](TheWorld.Map,0,0,0,0) end

TheWorld.Map:SetOverlayColor0(0,0,0,0)
TheWorld.Map:SetOverlayColor1(0,0,0,0)
TheWorld.Map:SetOverlayColor2(0,0,0,0)

Describe alternatives you've considered

If applicable, add a clear and concise description of any alternative solutions or features you've considered.

Additional context

If applicable, add any other context or screenshots about the feature request here.

[victorpopkov]

The simple solution for this problem, as a "Hide Ground Overlay" player vision suboption action, has been introduced in #6. However, it still needs a proper solution.